Question 6047 of 731 · Texas Journeyman Electrician Exam
In a wall of noncombustible material such as concrete or tile, a box may be set back from the finished surface by not more than
Exactly one answer is correct.
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Correct answer to question 6047
- C: 1/4 in
Explanation
Boxes in noncombustible walls or ceilings may be recessed not more than 1/4 in. In walls of wood or other combustible material, the box must be flush or project from the finished surface. See 314.20.
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